ios & android get mac address

最新推荐文章于 2025-04-17 22:58:54 发布

原创最新推荐文章于 2025-04-17 22:58:54 发布 · 1.8k 阅读

CC 4.0 BY-SA版权

本文介绍了一种在不同操作系统上获取指定网卡MAC地址的方法。通过使用sysctl和ioctl系统调用，文章提供了两种实现途径：一是利用sysctl获取网络接口列表并找到对应网卡的MAC地址；二是直接通过socket和ioctl来获取。这些方法对于需要在网络编程中识别特定设备的应用程序非常有用。

unsigned char       *ptr;
#ifndef SIOCGIFHWADDR
    int                 mib[6];
    size_t              len;
    char                *buf;

    struct if_msghdr    *ifm;
    struct sockaddr_dl *sdl;

    mib[0] = CTL_NET;
    mib[1] = AF_ROUTE;
    mib[2] = 0;
    mib[3] = AF_LINK;
    mib[4] = NET_RT_IFLIST;


    if ((mib[5] = if_nametoindex("en0")) == 0) {
        return "";
    }

    if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
        return "";
    }

    if ((buf = (char*)malloc(len)) == NULL) {
        return "";
    }

    if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
        free(buf);
        buf = NULL;
        return "";
    }

    ifm = (struct if_msghdr *)buf;
    sdl = (struct sockaddr_dl *)(ifm + 1);
    ptr = (unsigned char *)LLADDR(sdl);
#else
    int sock_mac;
    struct ifreq ifr_mac;
    char mac_addr[30];
    sock_mac = socket( AF_INET, SOCK_STREAM, 0 );

    if( sock_mac == -1)
    {
        perror("create socket falise...mac\n");
        return "";
    }
    memset(&ifr_mac,0,sizeof(ifr_mac));
    strncpy(ifr_mac.ifr_name, "eth0", sizeof(ifr_mac.ifr_name)-1);
    if( (ioctl(sock_mac, SIOCGIFHWADDR, &ifr_mac)) < 0)
    {
        printf("mac ioctl error\n");
        return "";
    }
    ptr = (unsigned char*)ifr_mac.ifr_hwaddr.sa_data;

    close( sock_mac );
#endif